It feels like cups have changed my period so that the first two days are heavier than they used to be, but the whole thing is over much faster (I never fill a cup past day 2 and am pretty much done by day 3). Other people have reported similar things, but I don't think there's been any research done on it.

My heavy days are much heavier than they used to be when I first started using cups, but infuriatingly, my period still manages to last 7 days. I go from over 1ml/hr on heavy days to 1ml/day on light days.

I keep telling my uterus to get its act together, but it keeps ignoring me.

Yup, it's just one of those speshul periods. I had one with my Si-Bell the day we were attending a rehearsal dinner. Of course. Luckily my uterus had stopped rebelling by the time the actual wedding rolled around lol.